How to refresh an AlertDialog in Flutter?

Question

Currently, I have an AlertDialog with an IconButton. The user can click on the IconButton, I have two colors for each click. The problem is that I

Answer 1

First you need to use StatefulBuilder. Then i am setting _setState variable, which even could be used outside StatefulBuilder, to set new state.

StateSetter _setState;
String _demoText = "test";

showDialog(
  context: context,
  builder: (BuildContext context) {

    return AlertDialog( 
      content: StatefulBuilder(  // You need this, notice the parameters below:
        builder: (BuildContext context, StateSetter setState) {
          _setState = setState;
          return Text(_demoText);
        },
      ),
    );
  },
);

_setState is used same way as setState method. For example like this:

_setState(() {
    _demoText = "new test text";
});